Preparation of tetrakis(dihydrocarbylamino)phosphonium halide

Details Preparation of tetrakis(dihydrocarbylamino)phosphonium halide Preparation of tetrakis(dihydrocarbylamino)phosphonium halide

C - Chemistry, Metallurgy

07

F

C07F 9/06 (2006.01) C07C 17/20 (2006.01)

Patent

CA 2278724

A mixture is made from (i) a tris(dihydrocarbylamino) phosphoroamidite and/or a hydrohalide thereof; (ii) a strong base (e.g., NaOH) in proportions of 2.0 to 4.0 moles of (ii) per mole of (i); and (iii) at least one solvent for the base (e.g., H2O). To this mixture is added a hydrocarbyl monohalide (e.g., EtBr) in proportions of 1.0 to 3.0 moles per mole of phosphoroamidite used in forming the initial mixture, and the resultant reaction produces tetrakis(dihydrocarbylamino)phosphonium halide. The process enables more efficient production of tetrakis(dihydrocarbylamino)phosphonium halides, and is capable of being effectively used in large scale production facilities while satisfying the economic constraints of commercial operations.

On prépare un mélange à partir de (i) un tris(dihydrocarbylamino) phosphoroamidite et/ou un hydrohalogénure de celui-ci, (ii) une base forte (telle que NaOH) dans des proportions de 2,0 à 4,0 moles de (ii) par mole de (i), et (iii) au moins un solvant pour la base (telle que H¿2?O). On ajoute à ce mélange un monohalogénure d'hydrocarbyle (tel que EtBr) dans des proportions de 1,0 à 3,0 moles par mole de phosphoroamidite utilisée dans le mélange de départ, et la réaction obtenue donne l'halogénure de tétrakis(dihydrocarbylamino)phosphonium. Ce procédé permet de produire plus efficacement les halogénures de tétrakis(dihydrocarbylamino)phosphonium et peut être utilisé avec efficacité dans des installations de production à grande échelle tout en répondant aux impératifs économiques des opérations industrielles.

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